ML Products Inc. v. Billiontree Technology USA Inc.

CourtDistrict Court, C.D. California
DecidedAugust 26, 2025
Docket2:23-cv-08626
StatusUnknown

This text of ML Products Inc. v. Billiontree Technology USA Inc. (ML Products Inc. v. Billiontree Technology USA Inc.) is published on Counsel Stack Legal Research, covering District Court, C.D. California primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
ML Products Inc. v. Billiontree Technology USA Inc., (C.D. Cal. 2025).

Opinion

5 UNITED STATES DISTRICT COURT 6 CENTRAL DISTRICT OF CALIFORNIA 7

8 Case No.: 2:23-cv-08626-MEMF-DTB ML PRODUCTS INC.,

9 Plaintiff, ORDER GRANTING IN PART AND 10 DENYING IN PART DEFENDANTS’ v. MOTION TO EXCLUDE EXPERT 11 REPORTS AND TESTIMONY [ECF NO. 96]

12 BILLIONTREE TECHNOLOGY USA, INC., 13 MOUNTAIN PEAK. INC., and DOES 1 through 25, inclusive, 14 Defendants. 15 16

17 Before the Court is the Motion to Exclude Expert Reports and Testimony (ECF No. 96) filed 18 by Defendants. For the reasons stated herein, the Court hereby GRANTS IN PART and DENIES IN 19 PART the Motion to Exclude Expert Report and Testimony. 20

26 / / / 27 / / / 28 1 I. Background 2 1. Factual Background 3 The present action stems from Plaintiff ML Products, Inc. (“ML Products”) and Defendants 4 BillionTree Technology USA, Inc. (“BillionTree”) and Mountain Peak, Inc. (“Mountain Peak,” 5 collectively, “Defendants”) competing for sales on Amazon.com where Defendants allegedly 6 employed fraudulent tactics. Specifically, ML Products asserts claims of violations of the Lanham 7 Act, false advertising, and unfair competition against Defendants. ECF No. 1. 8 On April 12, 2024, Professor Brett Hollenbeck (“Hollenbeck”), ML Products’s affirmative 9 technical expert, produced an expert report on his analysis of “the tactics related to online reviews 10 used by certain competitors of ML Products, including BillionTree and its [alleged] affiliates. . . .” 11 ECF No. 43-2 (“Hollenbeck Report” or “Hollenbeck Rep.”) ¶ 7. Broadly, Hollenbeck opined that 22 12 of the 29 products sold by BillionTree and its alleged affiliates engaged in review hijacking— 13 inappropriately linking a different product’s reviews to the given product on Amazon and 14 misrepresenting the product as having more positive reviews; reviewers of nine of the products 15 complained that the seller sent them emails requesting them to change negative reviews into positive 16 ones in exchange for payment; and by manipulating and falsifying product ratings, BillionTree 17 increased its visibility and sales on Amazon, misled customers, and lowered the visibility of its 18 competitors, thereby harming ML Products. Id. ¶¶ 9–11. 19 2. Procedural History 20 On April 17, 2025, Defendants filed the instant Motion to Exclude Expert Report and 21 Testimony. ECF No. 96 (“Motion”) Defendants also filed a Proposed Order on the Motion. ECF No. 22 96-1 (“PO”). 23 On May 1, 2025, ML Products filed an Opposition to Defendants’ Motion to Exclude Expert 24 Report and Testimony. ECF No. 107 (“Opposition” or “Opp’n.”). Also on May 1, ML Products filed 25 a Declaration of Dana R. Vogel in support of the ML Products’s Opposition. ECF No. 107-1 26 (“Vogel Declaration” or “Vogel Decl.”). 27 28 1 On May 8, 2025, Defendants filed a Reply in Support of the Motion. ECF No. 109 (“Reply”). 2 Also on May 8, Defendants filed a Declaration of Dandan Pan in support of the Reply. ECF No. 3 109-1 (“Pan Declaration” or “Pan Decl.”). 4 II. Legal Standard 5 1. Federal Rule of Evidence 702 6 Rule 702 “tasks a district judge with ensuring that an expert’s testimony both rests on a 7 reliable foundation and is relevant to the task at hand.” Hyer v. City & Cnty. of Honolulu, 118 F.4th 8 1044, 1055 (9th Cir. 2024). An expert opinion is relevant if the expert’s “scientific, technical, or 9 other specialized knowledge will assist the trier of fact to understand the evidence or to determine a 10 fact in issue.” Endo Fitness LL, LLC v. F-19 Holdings, LLC, No.: 2:22-cv-03124-MEMF-JC, 2023 11 WL 9319825, at *3 (C.D. Cal. Nov. 30, 2023). An expert opinion is reliable if (1) it is “based on 12 sufficient facts or data”; (2) it is “the product of reliable principles and methods”; and (3) it “reflects 13 a reliable application of the principles and methods to the facts of the case.” Fed. R. Evid. 702(b)– 14 (d). 15 The “judge is a gatekeeper, not a fact finder,” and the “gate [should] not be closed to [a] 16 relevant opinion offered with sufficient foundation by one qualified to give it.” Primiano v. Cook, 17 598 F.3d 558, 568 (9th Cir. 2010). The purpose of the gatekeeping role is to ensure that expert 18 testimony is “properly grounded, well-reasoned and not speculative,” but it is not meant to substitute 19 for “[v]igorous cross-examination, presentation of contrary evidence, and careful instruction on the 20 burden and proof [which] are the traditional and appropriate means of attacking shaky but admissible 21 evidence.” Fed. R. Evid. 702, Adv. Comm. Notes (2000) (quotation omitted). Thus, “[a]fter an 22 expert establishes admissibility to the judge’s satisfaction, challenges that go to the weight of the 23 evidence are within the province of a fact finder, not a trial court judge.” Pyramid Technologies, Inc. 24 v. Hartford Cas. Ins. Co., 752 F.3d 807, 814 (9th Cir. 2014); see City of Pomona v. SQM N. Am. 25 Corp., 750 F.3d 1036, 1047 (9th Cir. 2014) (“Daubert, however, does not forbid admission of a 26 report where the weight of the conclusions [is] subject to challenge.”) (citation and internal quotation 27 marks omitted). 28 1 “In determining whether expert testimony is admissible under Rule 702, the district court 2 must keep in mind Rule 702’s ‘broad parameters of reliability, relevancy, and assistance to the trier 3 of fact.’” Sementilli v. Trinidad Corp., 155 F.3d 1130, 1134 (9th Cir. 1998). Rule 702 is “broad 4 enough to allow an expert to rely on hypothetical facts that are supported by the evidence.” Fed. R. 5 Evid. 702, Adv. Comm. Notes (2000). Nevertheless, “[t]he court may exclude relevant evidence if 6 its probative value is substantially outweighed by a danger of . . . misleading the jury.” Fed. R. Evid. 7 403. 8 2. Federal Rule of Civil Procedure 26 9 Federal Rule of Civil Procedure 26 sets deadlines for the disclosure of expert witnesses and 10 rebuttal expert witnesses, which were modified by this Court in its Civil Trial Order. See Civil Trial 11 Order at 3.1

12 (2) Disclosure of Expert Testimony. (A) In General. In addition to the disclosures required by Rule 26(a)(1), a 13 party must disclose to the other parties the identity of any witness it may use at trial to present evidence under Federal Rule of Evidence 702, 703, or 14 705. . . . 15 (D) Time to Disclose Expert Testimony. A party must make these disclosures at the times and in the sequence that the court orders. Absent a 16 stipulation or a court order, the disclosures must be made: (i) at least 90 days before the date set for trial or for the case to be 17 ready for trial; or (ii) if the evidence is intended solely to contradict or rebut evidence 18 on the same subject matter identified by another party under Rule 26(a)(2)(B) or (C), within 30 days after the other party’s disclosure. 19 Fed. R. Civ. P.

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ML Products Inc. v. Billiontree Technology USA Inc., Counsel Stack Legal Research, https://law.counselstack.com/opinion/ml-products-inc-v-billiontree-technology-usa-inc-cacd-2025.